Cleaning the inside objective lens of a refractor
I recently did some tidying up in my observatory,and had a look down the scope to see if the objective lens was clean,the front was good,but I noticed some very small things on the inside side of the lens,possibly mould.What is the procedure to clean this side of the lens?I have heard people talk about this issue-not sure what the conclusions were-do people send the tube away to the manufacturer?or somewhere that specialises in taking them apart?or do others do this job themselves?The offending stuff is very small and does not affect seeing of photography.Interested to here what others do-as it sounds like this issue-will affect/has affected many before.Thanks.
Chris
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